login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A201860 Primes of the form 9n^2 - 2. 1
7, 79, 223, 439, 727, 1087, 3967, 4759, 5623, 8647, 13687, 18223, 31327, 33487, 53359, 56167, 71287, 74527, 77839, 81223, 91807, 95479, 99223, 127447, 149767, 159199, 164023, 184039, 189223, 194479, 199807, 239119, 245023, 263167 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

MATHEMATICA

Select[Table[9n^2-2, {n, 1, 800}], PrimeQ]

PROG

(MAGMA) [a: n in [1..400] | IsPrime(a) where a is 9*n^2-2];

CROSSREFS

Sequence in context: A139945 A023285 A135051 * A176130 A014232 A154592

Adjacent sequences:  A201857 A201858 A201859 * A201861 A201862 A201863

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 06 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 16 22:12 EST 2022. Contains 350376 sequences. (Running on oeis4.)